mason jar vacuum sealers

!st let me say i have not truely put these to the test!  so my 3 stars is not completely fair.  they came quickly and look like the pictures but when using them I dont feel like they are working so well.  The items themselves feel little cheaply made. Only time can tell if they are truely sucking out all the air.  I would not use this banking on truely vacum sealed until you used it a few times with something that will not make you sick when eating.  Candy or dried pasta or rice. Or maybe a product like bread that will harden when stale or visible is mold.  Im hoping the couple itmes used stand test of bit of time and i can use this product with confidence.